а) 1,5(x-3)=2,5(x-4)
1,5х - 4,5 = 2,5х - 10
1,5х - 2,5х =4,5 - 10
- 1х = - 5,5
х =5,5
b) 13x + 5 = 7
13x = 7 - 5
13x = 2
x = 2/13
а) 1,5(x-3)=2,5(x-4)
1,5х - 4,5 = 2,5х - 10
1,5х - 2,5х =4,5 - 10
- 1х = - 5,5
х =5,5
b) 13x + 5 = 7
13x = 7 - 5
13x = 2
x = 2/13